Suction tool for an electric vacuum cleaner

Abstract

A suction tool for an electric vacuum cleaner includes: a suction tool body which is connected to the vacuum cleaner body and has a suction inflow passage therein for conducting a suction air stream from a suction port, to the vacuum cleaner body; and a movable brush which is provided inside the suction inflow passage formed in the suction tool body and is driven by a driver device. In this tool, the movable brush sways and reciprocates back and forth about a support shaft, perpendicular to the direction of the suction inflow stream. Alternatively, the tool may have a linear motor which operates so as to reciprocate a rod which is liked at one end of it with oscillatory plate pivoted inside the suction tool. Further, this movable brush may be formed of a unit which is composed of a sweeping member having a pair of front and rear sweeping parts and a moving brushing part embedded in between, wherein the front sweeping part is shorter than the rear sweeping part.

What is claimed is:  
     
       1. A suction tool for an electric vacuum cleaner comprising: 
       a suction tool body which is connected to the vacuum cleaner body and has a suction inflow passage therein for conducting a suction air stream from a suction port opening on the bottom face thereof, to the vacuum cleaner body; and  
       a movable brush which is provided in the middle of the suction inflow passage inside the suction tool body and is driven by a driver device,  
       wherein a linear support shaft is located above the movable brush, and  
       means for connecting the movable brush to the support shaft, the movable brush which is driven by a motor is arranged so as to linearly reciprocate in the left and right directions relative to the inflow direction of the suction air stream.  
     
     
       2. A suction tool for an electric vacuum cleaner according to claim  1  wherein the means for connecting includes a plurality of outer support plates. 
     
     
       3. A suction tool for an electric vacuum cleaner according to claim  2 : 
       wherein the support plates are effective to move in the lateral direction along the support shaft.  
     
     
       4. A suction tool for an electric vacuum cleaner according to claim  2 : 
       further including;  
       a rotary piece with a cam surface,  
       the rotary piece located adjacent a single support plate.  
     
     
       5. A suction tool for an electric vacuum cleaner according to claim  4 : 
       further including;  
       a projection on the support plate abuting on a cam surface of the rotary piece.  
     
     
       6. A suction tool for an electric vacuum cleaner according to claim  5 : 
       wherein the cam surface is a slanted surface.  
     
     
       7. A suction tool for an electric vacuum cleaner according to claim  2 : 
       further including;  
       an elastic member located between an outer surface of a support plate and a bearing, so that the movable brush is urged toward a rotary piece.  
     
     
       8. A suction tool for an electric vacuum cleaner according to claim  7 : 
       wherein the elastic member is a coil spring.  
     
     
       9. A suction tool for an electric vacuum cleaner according to claim  11 : 
       further including;  
       means for changing a rotary motion of the motor to linear motion of the movable brush.  
     
     
       10. A suction tool for an electric vacuum cleaner according to claim  1 , 
       wherein the movable brush is solely a single brush that moves solely in the right and left direction.